WO2018020394A1 - Réactgeur uasb modifié, procédé de mise à profit énergétique et utilisation - Google Patents

Réactgeur uasb modifié, procédé de mise à profit énergétique et utilisation Download PDF

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Publication number
WO2018020394A1
WO2018020394A1 PCT/IB2017/054469 IB2017054469W WO2018020394A1 WO 2018020394 A1 WO2018020394 A1 WO 2018020394A1 IB 2017054469 W IB2017054469 W IB 2017054469W WO 2018020394 A1 WO2018020394 A1 WO 2018020394A1
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Prior art keywords
sludge
uasb reactor
modified
foam
modified uasb
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PCT/IB2017/054469
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English (en)
Portuguese (pt)
Inventor
Gilberto CALDEIRA BANDEIRA DE MELO
Carlos Augusto DE LEMOS CHERNICHARO
Cláudio LEITE DE SOUZA
Artur TÔRRES FILHO
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Universidade Federal De Minas Gerais
Engenho Nove Engenharia Ambiental Ltda.
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Publication of WO2018020394A1 publication Critical patent/WO2018020394A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C02F11/04—Anaerobic treatment; Production of methane by such processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/20—Waste processing or separation

Definitions

  • the present invention relates to an anaerobic reactor and a method for energy recovery of sludge in the effluent treatment unit itself.
  • the anaerobic reactor consists of a modified UASB (Upfiow Anaerobic Sludge Blanket) reactor with flexible structures and systems that allow flow reversal integrated with its operating mechanism: sludge inflow / disposal system and the last scum removal system composed of a floating device.
  • the modified UASB reactor can be used for biogas production and, additionally, as a device for treatment and cleaning of gases generated in the thermal gasifier, allowing the use of combustible gases (biogas and treated gasogen) in devices that require more demanding quality, such as engines. internal combustion or turbines.
  • the proposed technology can be used for the treatment of domestic, industrial, agroindustrial effluents and for the generation of electrical and / or thermal energy, for example in combustion systems such as explosion engines and / or furnaces.
  • This technology has as main advantages, compared to conventional anaerobic reactors and associated sludge management techniques, better energy efficiency, economy and operational simplicity.
  • UASB reactors are widely used in wastewater treatment plants due to their numerous advantages. These reactors require small installation areas and are generally cylindrical or prismatic rectangular in shape with concrete or steel structures. However, these materials are susceptible to corrosion caused by aggressive compounds present in the treated effluent and biogas, requiring the use of alloyed steels or the application of coatings to prevent and / or repair damage to structures.
  • the energy utilization of the sludge through the process of individual or biogas conjugated thermal gasification is usually proposed to favor cogeneration in effluent treatment plants.
  • this conjugation consists of using the gases generated from the UASB reactor and the thermal gasifier separately. Each gas undergoes a cleaning and / or conditioning process and is then applied to a combustion and energy utilization system for the generation of electricity and / or heat.
  • exhaust gases from combustion systems may be used for drying sludge in dryers.
  • the patent document GB 1020130315990 entitled ⁇ Biodigester improved _ refers to a digester in rotomoulded polyethylene, i.e. a product consisting of a single piece of flat base that carries the work of a UASB reactor and an anaerobic filter for the treatment of domestic effluent.
  • This system differs from the present technology because the reactor is a cylindrical tank made of polymeric material and not by structures on slopes. Another difference is in the sludge extraction mechanism, which happens by pressure difference based on the communicating vessel system, and not by inversion of flow through the same inlet structures.
  • the US2009188850 patent document entitled ⁇ ist for residual treating water_ is a conformation of an anaerobic system wastewater treatment by digging in the ground, which is covered by a PVC cover and presents three segments, equipped with a reactor, a deep chamber and an anaerobic lagoon, in a single body covered by a PVC blanket.
  • this system is more complex and costly, requiring large areas for deployment as it requires three fermentation chambers.
  • Another disadvantage is that it is not a UASB reactor and there are no systems or devices for removing scum, which will lead to the need for any system interruptions to clean and / or remove this byproduct.
  • the patent document PI 0105959-9 entitled ⁇ compact system UASB / biological trickling filter wastewater treatment _ refers to a wastewater treatment system, which combines in a single unit, a reactor Compartmentalized UASB and an aerobic percolator biological filter.
  • the reactor consists of a distribution box with adjustable spillways and switching registers, which allows one to three digestion compartments to be fed in parallel to the UASB reactor.
  • the method for effluent distribution has a disadvantage, such as the impossibility of inversion of flow for sludge removal, which only limits the insertion of sewage into the system.
  • the patent document JP 2000210693, entitled ⁇ ⁇ anaerobic treating device proposes an anaerobic UASB treatment tank capable of performing removal of skimmings by an adjustable device located at the top of the reactor on the treated water outlet surface.
  • the foam extraction device comprises a gutter-shaped opening connected to an expandable tube which in turn is connected to a foam discharge tube. Foam accumulates on the surface of the UASB reactor and when discharge is required, the fasteners must be removed from the upper beams to contract the expansion tube, the floating foam drains into the open part of the device due to the difference in water level and flows naturally through the discharge tube to the outside of the reactor.
  • This device however, has drawbacks as it requires direct contact with the operator as it is responsible for maintaining the fastener with the extractor device removed during operation and also making adjustments to the height of the device to make extraction possible.
  • DE10107712 entitled “Biofuel production involving returning methane from sludge gasification reactor to anaerobic sludge treatment stage
  • the method consists of supplying the sludge gasification gas to a set of digesters.
  • This system differs mainly because the anaerobic devices are septic tanks.
  • the disadvantage is the necessity of heating at least one of the digesters and the fact that it requires recirculation ducts for biogas and sludge gas to circulate through the contents of the digester.
  • the proposed solution comprises a UASB (Upflow Anaerobic Sludge Blanket) anaerobic reactor and a method for energy recovery from sludge and solid by-products in the effluent treatment unit itself.
  • the modified UASB reactor is formed by a flexible three-phase structure formed by a slope covered by a gas chamber bottom blanket hermetically closed by a blanket and comprises a three phase separator anchored to the slope by an anchor block and support structures. floating.
  • the modified UASB reactor comprises systems integrated with its operating mechanism: integrated tributary inlet system and sludge and sludge removal system comprising floating sludge removal devices. Both systems allow flow inversion to remove by-products generated by the biological process.
  • effluent treatment being the sludge and the foam used energetically, associated or not to other biologically active byproducts through the thermal gasification process, providing the increment of combustible gases to the biomethanization performed in the UASB reactor.
  • the application of technology in wastewater treatment system has the following advantages: operational simplicity; low deployment cost due to flexible structures; greater safety for the operators involved; inhibition of the formation of undesirable and corrosive compounds in biogas and removal of fumes and particles from the combustible gases generated in the thermal gasifier; reduction of greenhouse gas emissions to the atmosphere; higher methane transfer from the UASB reactor to the gas collection chamber, and minimization of biologically active solid by-products sludge.
  • Figure 1 shows the cut-off AA modified UASB reactor, showing digestion compartment (2), settling compartment (3), gas chamber (4), slope (5), bottom blanket (6), blanket (7), biogas manifold (8), three-phase separator (9), floating support structure (10), diffuser tubing (1 1), inlet box (12), drainage pipes (13) , Inlet Ducts (14), Barrel (15), Influent Valve (16), Sludge Valve (17), Floating Foam Removal Device (19), Passage Box (24), Treated Effluent Collection Tube (25), anchor block (26), foam (28) and thermal gasifier (30).
  • Figure 2 shows a top view of the modified UASB reactor showing the piping with diffusers (11), flow distribution box (12), drainage pipes (13), inlet ducts (14), pump set (18), Floating Foam Removal Devices (19), Foam Tubing (20), Barrel (15), Suction Barrel (21), Hoses (22), Housing bypass (24), treated effluent collection tube (25) and aerator (30);
  • Figure 3 shows the scum removal system with an enlarged view of the scum removal device (19) showing the pickup cone (23), hoses (22), floating device support structure (10), three phase separator (9), foam (28), pipe with connection (33).
  • the present invention relates to an anaerobic reactor and a method for energy recovery from sludge in the effluent treatment unit itself.
  • the anaerobic reactor consists of a modified UASB (Upflow Anaerobic Sludge Blanket) reactor with flexible structures and systems that allow flow reversal integrated with its operating mechanism: sludge inflow / waste disposal system and the last scum removal system. composed of a floating device.
  • the modified UASB reactor can be used for biogas production and, additionally, as a device for treatment and cleaning of gases generated in the thermal gasifier, allowing the use of combustible gases (biogas and treated gasogen) in devices that require more demanding quality, such as engines. internal combustion or turbines.
  • the proposed technology can be used for the treatment of domestic, industrial, agroindustrial effluents and for the generation of electrical and / or thermal energy, for example in combustion systems such as explosion engines and / or furnaces.
  • This technology has as main advantages, compared to conventional anaerobic reactors and associated sludge management techniques, better energy efficiency, economy and operational simplicity.
  • Figures 1 and 2 represent the proposed modified UASB reactor.
  • the modified UASB reactor is formed by a slope (5), a bottom blanket (6) and a blanket (7) fitted with a gas manifold (8) and equipped with the following elements: three-phase separator (9), floating support structure (10) and diffuser tubing (1 1); It comprises a configuration that allows the removal of sludge (27) and foam (28) by reversing flows through systems integrated with its operating mechanism: sludge inflow / disposal system and a foam removal system with a floating scum removal device (19) for extracting the bottom and top by-products generated by the effluent treatment process.
  • the conformation of the modified UASB reactor is three phase and comprises the digestion compartment (2) and the settling compartment (3) delineated by the inclined plane of the slope (5); and a gas chamber (4) bounded by the blanket (7).
  • the slope presents an inverted pyramidal trunk shape, to prevent high dispersion of the sludge (27) during the effluent treatment process, and variable inclination in a range of 20 Q to 60 ° due to the soil type aiming at its stability. its surface protected by the bottom blanket (6). Openings are provided in the top of the slope (5) for the passage of drainage pipes (13), foam pipe (20), pipe with diffusers (11) and in the settling compartment region (3) for pipe allocation. treated effluent collection (25).
  • the settling compartment (3) is demarcated by the three-phase separator (9), which must delimit openings to allow the passage of liquid in its upward flow.
  • the three-phase separator (9) must be anchored to the slope (5) by concrete anchor blocks (26) and floating support structures (10), fixed to these structures (10) by welding polymeric materials.
  • Floating support frames (10) are buoys that can have varied designs used as support for the three phase separator (9) and for floating devices.
  • the floats (10) are located inside the gas chamber (4), which is delimited by the blanket (7) provided by a gas collector (8).
  • the blanket (7) hermetically closes the slope (5) and is secured by anchor structures (34), which can be constructed of concrete with protection against sulphide-rich atmosphere or with anchor (34) being held in-house. land for confinement of generated biogas (29).
  • passage boxes (24) are provided coupled to treated effluent collection tubes (25).
  • the materials employed in the construction of the modified UASB reactor may be geomembranes made of polymeric materials, with the bottom mat (6) and the three-phase separator (9) preferably in high density polyethylene (HDPE), and the blanket mat. (7) preferably low density polyethylene (LDPE), PVC or high density polyethylene (HDPE).
  • the treated drainage and drainage pipes (13) may preferably be made of high density polyethylene (HDPE), low density polyethylene (LDPE) or PVC.
  • the modified UASB reactor can be configured to extract sludge (27) and foam (28) in an integrated manner to its operating mechanism by reversing flow from affluent inlet / sludge disposal and scum removal system.
  • the effluent inlet / sludge inlet system is responsible for inflow, recirculation and / or removal of sludge (27) and scum (28) into the bottom of the reactor and is flexible enough to carry out these operations. at the same time comprising a flow distribution box (12) provided with flow pipes (13) with tributary valves (16), inlet ducts (14), barrel (15) with sludge valve (17) and pump assemblies (18).
  • the removal of the sludge (27) and the scum (28) in the digestion regions (2) occurs by suction through the pump set (18), which allows the removal of these by-products through their connection with the barrel (15), which It is interconnected to the flow pipes (13) which are connected to the inlet ducts (14) of the flow distribution box (12), through which the tributary is distributed and applied to the bottom of the modified UASB reactor (1).
  • Influent inflow, recirculation and / or sludge withdrawal flow (27) can be managed by opening the tributary valves (16) to direct the tributary to the bottom of the reactor or opening the sludge valves (17). ) in the barrel (15) for recirculation and / or removal of sludge (27).
  • the affluent inlet / discharge system permits flow reversal of at least one of the flow pipes (13) by simply closing the affluent valves (16) and opening the sludge valves (17). Instead of entering the tributary into the modified UASB reactor (1), sludge (27) and / or foam (28) may be removed.
  • the scum removal system is responsible for the extraction of this accumulated floated material on the surface of the reactor.
  • This system consists of motor pump assemblies (18), floating foam removal devices (19), foam tubing (20) and suction barrel (21) with flow block valves (35).
  • Floating scum removal devices (19, figure 3) comprise floating support structures (10), hoses (22), pickup cone (23) and a pipe with connection (33).
  • Floating foam removal devices (19) are arranged in central regions of the modified UASB reactor (1) to facilitate the passage of biogas (29) in this region.
  • the pump set (18) For the execution of the scum removal system, the pump set (18) must also have connection with the suction barrel (21), which is connected to the foam pipe (20) which is connected to the floating foam removal devices (19) through hoses (22) which in turn are coupled to a pipe with connection (33) connected to the pickup cone (23), which is anchored to the floating support structures (10) by screw clamping systems (35) made of anticorrosive materials, resistant to sulphide rich atmospheres.
  • the foam suction ducts, i.e. the pickup cones (23) are interconnected with motor pump assemblies (18) to act on each floating foam removal device (19) independently.
  • the scum removal system is managed by simple open / close operations independent of the suction barrel flow block valves (35) for the scum (28) to be removed independently on each float ( 19).
  • the tributary / waste inlet system and the scum removal system share the same motor pump assemblies (18) interconnected to the barrel (15) and the suction barrel (21) by a pipeline (39).
  • the modified UASB reactor can be used for domestic, industrial and agro-industrial wastewater treatment.
  • Effluent treatment begins with the conventional preliminary steps of removing coarse materials and sand, and then the tributary is conveyed to the flow distribution boxes (12), which pour the liquid into the drainage pipes (13). ), coupled to its output.
  • the flow pipes (13) are interconnected with inlet ducts (14), attached by strips (36) of polymeric materials to the slopes (5), which lead the tributary to the center of the reactor, in the lower part of the compartment. of digestion (2).
  • the upward flow of sewage through the bed and the sludge blanket enables the anaerobic microorganisms present to promote the degradation of organic matter.
  • Biogas (29), sludge (27) and foam (28) are formed and secreted by the three-phase separator (9), which enables: i) the entrained sludge (27) to sediment and return to the digestion compartment (2); ii) the formed gas is directed into the gas chamber; and iii) the liquid passes through its openings to the settling compartment (3) and leaves the reactor through the treated effluent collection tubes (25), which are interconnected to the passage boxes (24), in the external region of the reactor. . Excess sludge (27) is extracted by closing the affluent valve (16), which blocks liquid entry into at least one of the flow pipes (13).
  • the opening of the sludge valve (17) of the corresponding extension of the barrel (15) and the concomitant actuation of the pump assembly (18) enables the sludge (27) to be pumped through the drainage pipes (13), which then pass through. operate in reverse flow to the distribution of the tributary.
  • This operation provides sludge removal at various times from the digestion compartment (2).
  • the same operation can be performed using the same pump set (18) driven by opening and closing the flow block valves (35) of the suction barrel (21).
  • the foam (28) accumulated at the gas / liquid interface pours into the pickup cone (23) of the floating foam removal device (19) to be collected for final disposal, which may be thermal gasification after dehydration of the material.
  • the present technology also proposes a method of energy utilization of the sludge (27) and the sludge (28) extracted by the sludge inflow / disposal and the sludge removal systems, from an associated thermal gasification process. biomethanization performed by the modified UASB reactor. The method consists of the following steps: a) Prepare the sludge (27) and the skim (28) extracted from the modified UASB reactor for thermal gasification to adjust the humidity and particle size parameters;
  • All steps a through c of the energy recovery method may be carried out simultaneously with sludge inlet / effluent inlet and sludge removal systems. That is, at the same time as the tributary and combustible gases (31) enter the modified UASB reactor, the sludge (27) and / or foam (28) can be removed.
  • the preparation of the sludge (27) and the skim (28) in step a may be carried out by drying and briquetting processes, not limited to them, provided that they are processes that satisfy the conditions inherent in each type of thermal gasifier. (30).
  • the thermal gasifier (30) of step 3 ⁇ 4_ may be a fixed bed or fluidized bed gasifier, the sludge gasification process (27) and foam (28) of step equival being equivalent or not to be associated with other materials. and solid substrates of an organic nature external to the effluent treatment plant, or those retained in the preliminary treatment.
  • the sludge gasification consists of its conversion in high hydrogen (H 2 ) and carbon monoxide (CO) combustible gases, inert gases (nitrogen, water), tars and particulate matter, formed under the effect of high temperatures in the presence of oxidizing agent. The only final waste is ash in minimized quantities, which may eventually be used for agricultural use and / or disposed of.
  • step c_ the forwarding of the combustible gas gases (31) into the UASB reactor as described in step c_ occurs from the interconnection of the outlet of the thermal gasifier (30) to the piping with diffusers (1 1). modified UASB reactor as shown in figures 1 and 2.
  • the modified UASB reactor can be used for treatment of domestic, industrial and agroindustrial effluents and as a device for the treatment and cleaning of combustible gases (31) from the thermal gasifier (30), removing particulate matter and condensable or soluble tars.
  • the combination of biogas (29) and fuel gases (31) can be used for energy use in combustion systems with higher gas quality requirements, for example in internal combustion engines or gas turbines;
  • Combustible gases (31) from thermal gasifier (30) may be used as promoters of the transfer of dissolved methane within the liquid mass in the gas phase modified UASB reactor, minimizing methane losses in dissolved form in the effluent. Final. This makes it possible to reduce greenhouse gas emissions to the atmosphere and increase the efficiency of collection and energy utilization of biogas (29) by its removal in the gas chamber (4);
  • Combustible gases (31) may be used as inhibitors of the formation of undesirable compounds in biogas, in particular sulphides, as these gases have residual oxygen content capable of inhibiting sulphide formation or promoting their biological oxidation. without significantly affecting the degree of anaerobiosis in the modified UASB reactor due to the low oxygen content of the injected gases.
  • the proposed technology has as main advantages: the minimization of generation of sludge and biologically active solid by-products in the operation of the effluent treatment plant, operational simplicity, especially in sludge (27) and scum removal operations. (28); greater security for the professional involved in the process; lower environmental impact, higher energy efficiency and low operating and deployment costs.
  • the modified UASB reactor associated with a thermal gasifier (30) to provide execution of the sludge energy utilization method is shown in Figures 1 and 2.
  • the modified UASB reactor is represented by section AA and shows its inverted trunk-pyramidal three-phase structure, formed by slope (5) at a slope of 45 Q and covered by a bottom blanket (6 ). Slope openings are shown (5), specifically in the center of the upper left, for the flow of drainage pipes (13) and foam pipe (20, figure 2), in the upper right for the flow of diffuser pipe (11) and around the slope (5) for the allocation of treated effluent collection tubes (25), the slope (5) being hermetically closed by the blanket (7).
  • the reactor has the following internal parts: digestion compartment (2), settling compartment (3) and gas collection chamber (4).
  • the digestion (2) and decantation (3) compartments are delimited by the slope (5).
  • All flow ducts (13) have a flow valve (16) for blocking the inflow in the reactor and each corresponding branch of the barrel.
  • the barrel (15) has a sludge valve (17).
  • the barrel (15) is interconnected to the entrance of the pump set (18, figure 2) which allows pumping of the by-products formed during the effluent treatment process (sludge (27), foam (28) and biogas (29)) by any of the flow pipes (13) promoting the formation of the affluent inlet / disposal system.
  • the piping with diffusers (11) positioned concentrically inside the reactor is allocated. This connects to the gas outlet of the thermal gasifier (30) to provide the injection of gases from the sludge gasification (27) into the liquid mass contained inside the reactor to favor the method of energy utilization of the sludge.
  • To the right of the modified UASB reactor is positioned downdraft thermal gasifier (30), on the left is the flow distribution box (12).
  • the flow distribution box (12) is compartmentalized and consists of spillways (37) for equitable division of the tributary to the reactor inlet ducts, with the possibility of blocking through the affluent valve (16) and inversion of the flow at each branch. flow (13) independently.
  • the settling compartment (3) is formed on the upper sides of the reactor, demarcated by a three phase separator (9) which is positioned and secured to the slope (5) by means of anchor blocks (26) and support structures. floating (10).
  • opening is provided for allocation of treated effluent collection tubes (25) with right angled end for the passage of liquid to passage boxes (24) through which the effluent will leave the reactor.
  • These boxes (24) are built outside the reactor periphery to collect treated effluent.
  • the floating support structures (10) of the scum removal devices (19, figure 3) are allocated, with the collection cone (23) ) disposed below the foam layer (28) so that this supernatant material is poured into the take-up cone (23), which is connected to the hose (22) by a connecting pipe (33).
  • the hose (22) is also connected to the foam pipe (20) which, in turn, is connected to the pump assembly (18) through the suction barrel (21).
  • the foam pipe (20) has a suction barrel (21) with flow block valves (35) for controlling each foam removal device (19) and for forming the foam removal system.
  • the pump assembly (18) interconnects the tributary inlet system barrel (15) and the de-scum system suction barrel (21). (39) and must be installed inside the pump room (32) for weather protection.
  • the gas chamber (4) is delimited by the liquid surface and the blanket (7) with a gas collector (8) for the capture of biogas (29) and gasifier gas (gases and fuels). (31)) generated.
  • a gas collector (8) for the capture of biogas (29) and gasifier gas (gases and fuels). (31)) generated.
  • the floating support structures (10) responsible for the support of the three phase separator (9) and the floating foam removal devices (19).
  • the design of the effluent treatment unit comprises the top-view modified UASB reactor, a section below the blanket blanket (7) for a better view of its previously described internal components as shown in figure 1 .
  • the scum removal system shown in Figure 3 shows a detailed drawing of the scum removal device (19) with the pickup cone (23) coupled to a pipe, ie pipe with connection (33). connected to the hose (22) which directs the foam (28) suctioned by the motor pump assembly (18, figure 2).
  • the pickup cone (23) is supported by the floating support structures of the device (10).

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Microbiology (AREA)
  • Organic Chemistry (AREA)
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  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Treatment Of Sludge (AREA)
  • Removal Of Floating Material (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

La présente invention concerne un réacteur anaérobie et un procédé de mise à profit énergétique de boues dans l'unité de traitement d'effluents elle-même. Le réacteur anaérobie consiste en un réacteur UASB (Upflow Anaerobic Sludge Blanket) modifié avec des structures souples et des systèmes permettant l'inversion de flux intégré au mécanique fonctinnel : système d'entrée de l'affluant/rejet de boues et système d'élimination d'écume, ce dernier étant constitué par un dispositif flottant. Le réacteur UASB modifié peut être utilisé pour la production de biogaz et, par ailleurs, comme dispositif pour le traitement et le lavage de gaz produits dans le gazéificateur thermique, permettant la mise à profit des gaz combustibles (biogaz et gazogène traité) dans des dispositifs requérant une qualité plus exigeante, tels que les moteurs à combustion interne ou les turbines. La technologie proposée peut être utilisée pour le traitement d'effluents domestiques, industriels, agro-industriels, et pour la production d'énergie électrique et/ou thermique, notamment dans des systèmes de combustion tels que des moteurs à explosion et/ou des fours. Cette technologie présente comme principaux avantages, par comparaison avec les réacteurs anaérobies classiques et les techniques associées de gestion des boues, un meilleur rendement énergétique, un faible coût et une simplicité fonctionnelle.
PCT/IB2017/054469 2016-07-27 2017-07-24 Réactgeur uasb modifié, procédé de mise à profit énergétique et utilisation WO2018020394A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109020127A (zh) * 2018-08-03 2018-12-18 河海大学 一种原位修复底泥内源污染的多功能耦合型生态毯
CN112340935A (zh) * 2020-10-21 2021-02-09 江阴市环宇环境工程有限公司 一种上流式厌氧污泥塔及废水脱氧预处理方法

Citations (3)

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